公开(公告)号：US10972781B2

公开(公告)日：2021-04-06

申请号：US16430506

申请日：2019-06-04

Applicant: MaxLinear, Inc.

Inventor： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

IPC: H04B1/16 ,  H04B1/00 ,  H04N21/426 ,  H04N5/50 ,  H04N21/438 ,  H04N21/454 ,  H04N21/61 ,  H04N5/455

Abstract: A wideband receiver system comprises a wideband analog-to-digital converter (ADC) module and a digital frontend (DFE) module. The wideband ADC is configured to concurrently digitize a band of frequencies comprising a plurality of desired channels and a plurality of undesired channels. The DFE module is coupled to the digital in-phase and quadrature signals. The DFE module is configured to select the plurality of desired channels from the digitized band of frequencies, and generate an intermediate frequency (IF) signal comprising the selected plurality of desired channels and having a bandwidth that is less than a bandwidth of the band of frequencies, where the generation comprises frequency shifting of the selected plurality of desired channels. The IF signal may be a digital signal and the DFE is configured to output the IF signal via a serial or parallel interface.

公开(公告)号：US20170214478A1

公开(公告)日：2017-07-27

申请号：US15402691

申请日：2017-01-10

Applicant: MaxLinear, Inc.

Inventor： Glenn Chang ,  Sridhar Ramesh ,  Tim Gallagher

IPC: H04J1/04 ,  H04W16/14 ,  H04N21/438 ,  H04B1/525 ,  H04L12/28 ,  H04J1/12

CPC classification number: H04J1/045 ,  H04B1/525 ,  H04J1/12 ,  H04L12/2801 ,  H04L12/2838 ,  H04N21/438 ,  H04W16/14

Abstract: Methods and systems are provided for use of tunable bandwidths. An example system may comprises a plurality of filters, with each of filters being configured for filtering signals corresponding to a particular frequency band associated with a particular stream. One or more adjustments may be determined and applied to one or more of the plurality of filters. The adjustments may comprise modifications to at least one frequency band associated with at least one of the plurality of filters. Leakage affecting the plurality of filters may be measured or estimated, and a compensation adjustment applicable to particular transmitted and/or received signals may be determined based on measured or estimated leakage. The leakage may be estimated based on analysis of digital baseband signals corresponding to transmitted and/or received signals.

公开(公告)号：US09438457B2

公开(公告)日：2016-09-06

申请号：US14809130

申请日：2015-07-24

Applicant: MaxLinear, Inc.

Inventor： Curtis Ling ,  Tim Gallagher ,  Elad Shaked

IPC: H04L27/28 ,  H04L27/26 ,  H04J11/00

CPC classification number: H04L27/2614 ,  H04J2011/0009 ,  H04L27/2627

Abstract: A transmitter comprises a first peak-to-average-power ratio (PAPR) suppression circuit, a second peak-to-average-power ratio (PAPR) suppression circuit, and a first modulator. The first PAPR suppression circuit may receive a first sequence of time-domain symbols to be transmitted, alter the first sequence based on each of a plurality of symbol ordering and/or inversion descriptors to generate a corresponding plurality of second sequences of time-domain symbols, measure a PAPR corresponding to each of the second sequences, select one of the plurality of symbol ordering and/or inversion descriptors based on the measurement of PAPR, and convey the selected one of the symbol ordering and/or inversion descriptors to the second PAPR suppression circuit. The second PAPR suppression circuit may receive the first sequence of time-domain symbols to be transmitted, and alter the first sequence based on the selected one of the symbol ordering and/or inversion descriptors to generate a reordered and/or inverted symbol sequence.

Abstract translation: 发射机包括第一峰值与平均功率比（PAPR）抑制电路，第二峰值与平均功率比（PAPR）抑制电路和第一调制器。 第一PAPR抑制电路可以接收要发送的第一时间域符号序列，基于多个符号排序和/或反转描述符中的每一个改变第一序列，以生成对应的多个第二时间序列的时域符号 测量与每个第二序列相对应的PAPR，基于PAPR的测量来选择多个符号排序和/或反演描述符中的一个，并将所选择的一个符号排序和/或反演描述符传送到第二PAPR 抑制电路。 第二PAPR抑制电路可以接收要发送的第一时间域符号序列，并且基于所选择的符号排序和/或反转描述符之一改变第一序列，以生成重新排序和/或反转的符号序列。

公开(公告)号：US09184976B2

公开(公告)日：2015-11-10

申请号：US14469281

申请日：2014-08-26

Applicant: Maxlinear, Inc.

Inventor： Yangtao Wang ,  Curtis Ling ,  Tim Gallagher

IPC: H04L27/38 ,  H04L27/36 ,  H04L27/233

CPC classification number: H04L27/3863 ,  H04L27/2334 ,  H04L27/2338 ,  H04L27/361 ,  H04L27/366

Abstract: Methods and systems for I/Q mismatch calibration and compensation for wideband communication receivers may include receiving a radio frequency (RF) signal in a receiver of a communication device, down-sampling the received RF signal to generate a channel k and its image channel −k at baseband frequencies, and determining average in-phase (I) and quadrature (Q) gain and phase mismatch of the channel k and the image channel −k. A curvature of gain mismatch for the channel k and the image channel −k may be estimate utilizing a blind source separation (BSS) estimation algorithm. The average I and Q gain and phase mismatch of the channel k and the image channel −k may be removed. A residual phase tilt and a residual amplitude tilt of the channel k and the image channel −k (with removed average I and Q gain and phase mismatch) may be determined.

Abstract translation: 用于宽带通信接收机的I / Q失配校准和补偿的方法和系统可以包括在通信设备的接收机中接收射频（RF）信号，对所接收的RF信号进行下采样以产生信道k及其图像信道 - k，并确定通道k和图像通道-k的平均同相（I）和正交（Q）增益和相位失配。 可以使用盲源分离（BSS）估计算法来估计信道k和图像信道-k的增益失配曲率。 可以消除通道k和图像通道-k的平均I和Q增益和相位失配。 可以确定通道k和图像通道-k（具有去除的平均I和Q增益和相位失配）的残余相位倾斜和残余幅度倾斜。

公开(公告)号：US09100622B2

公开(公告)日：2015-08-04

申请号：US13962871

申请日：2013-08-08

Applicant: MAXLINEAR, INC.

Inventor： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

IPC: H04B1/16 ,  H04N5/50 ,  H04B1/00 ,  H04N21/426 ,  H04N21/438 ,  H04N21/454

CPC classification number: H04N21/4263 ,  H04B1/0014 ,  H04N5/455 ,  H04N5/50 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/454 ,  H04N21/6143 ,  H04N21/6193

Abstract: A wideband receiver system is provided to concurrently receive multiple RF channels including a number of desired channels that are located in non-contiguous portions of a radio frequency spectrum and to group the number of desired channels into a contiguous frequency band. The system includes a wideband receiver having a complex mixer for down-shifting the multiple RF channels and transforming them to an in-phase signal and a quadrature signal in the baseband. The system further includes a wideband analog-to-digital converter module that digitizes the in-phase and quadrature signals and a digital frontend module that transforms the digital in-phase and quadrature signals to baseband signals that contains only the number of desired RF channels that are now located in a contiguous frequency band. An up-converter module up-shifts the baseband signals to a contiguous band in an IF spectrum so that the system can directly interface with commercially available demodulators.

Abstract translation: 提供宽带接收机系统以同时接收多个RF信道，包括位于无线电频谱的非连续部分中的多个期望信道，并将期望信道的数目分组成连续的频带。 该系统包括具有复合混频器的宽带接收机，用于对多个RF信道进行下变频并将其变换成基带中的同相信号和正交信号。 该系统还包括将同相和正交信号数字化的宽带模数转换器模块和将数字同相和正交信号转换成仅包含所需RF频道数量的基带信号的数字前端模块， 现在位于连续的频带。 上变频器模块将基带信号升级到IF频谱中的连续频带，使系统可以直接与市售解调器接口。

公开(公告)号：US09942598B2

公开(公告)日：2018-04-10

申请号：US14948907

申请日：2015-11-23

Applicant: MaxLinear, Inc.

Inventor： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

IPC: H04B1/16 ,  H04N21/426 ,  H04B1/00 ,  H04N5/50 ,  H04N21/438 ,  H04N21/454 ,  H04N21/61 ,  H04N5/455

CPC classification number: H04N21/4263 ,  H04B1/0014 ,  H04N5/455 ,  H04N5/50 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/454 ,  H04N21/6143 ,  H04N21/6193

Abstract: A wideband receiver system comprises a mixer module, a wideband analog-to-digital converter (ADC) module, and digital circuitry. The mixer module is configured to downconvert a plurality of frequencies that comprises a plurality of desired television channels and a plurality of undesired television channels. The wideband ADC module is configured to digitize the swatch of frequencies comprising the plurality of desired television channels and the plurality of undesired television channels. The digital circuitry is configured to select the desired plurality of television channels from the digitized plurality of frequencies, and output the selected plurality of television channels to a demodulator as a digital datastream.

公开(公告)号：US20150085904A1

公开(公告)日：2015-03-26

申请号：US14492891

申请日：2014-09-22

Applicant: MaxLinear, Inc.

Inventor： Kishore Seendripu ,  Raja Pullela ,  Madhukar Reddy ,  Tim Gallagher

IPC: H04B1/40 ,  H04L27/20 ,  H04L27/22 ,  H04L25/02

CPC classification number: H04B1/745 ,  H04B1/0067 ,  H04B1/40 ,  H04H60/19 ,  H04L25/02 ,  H04L27/20 ,  H04L27/2003 ,  H04L27/22 ,  H04L27/36 ,  H04L27/362 ,  H04L27/38

Abstract: A microwave backhaul system may comprise a monolithic integrated circuit comprising an on-chip transceiver, digital baseband processing circuitry, and auxiliary interface circuitry. The on-chip transceiver may process a microwave signal from an antenna element to generate a first pair of quadrature baseband signals and convey the first pair of phase-quadrature baseband signals to the digital baseband processing circuitry. The auxiliary interface circuitry may receive one or more auxiliary signals from a source that is external to the monolithic integrated circuit and convey the one or more auxiliary signals to the digital baseband processing circuitry. The digital baseband processing circuitry may be operable to process signals to generate one or more second pairs of phase-quadrature digital baseband signals.

Abstract translation: 微波回程系统可以包括单片集成电路，其包括片上收发器，数字基带处理电路和辅助接口电路。 片上收发器可以处理来自天线元件的微波信号以产生第一对正交基带信号，并将第一对相位正交基带信号传送到数字基带处理电路。 辅助接口电路可以从单片集成电路外部的源接收一个或多个辅助信号，并将一个或多个辅助信号传送到数字基带处理电路。 数字基带处理电路可以用于处理信号以产生一个或多个第二对相位正交数字基带信号。

公开(公告)号：US20200162781A1

公开(公告)日：2020-05-21

申请号：US16430506

申请日：2019-06-04

Applicant: MaxLinear, Inc.

Inventor： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

IPC: H04N21/426 ,  H04B1/00 ,  H04N5/50 ,  H04N21/438 ,  H04N21/454 ,  H04N21/61 ,  H04N5/455

Abstract: A wideband receiver system comprises a wideband analog-to-digital converter (ADC) module and a digital frontend (DFE) module. The wideband ADC is configured to concurrently digitize a band of frequencies comprising a plurality of desired channels and a plurality of undesired channels. The DFE module is coupled to the digital in-phase and quadrature signals. The DFE module is configured to select the plurality of desired channels from the digitized band of frequencies, and generate an intermediate frequency (IF) signal comprising the selected plurality of desired channels and having a bandwidth that is less than a bandwidth of the band of frequencies, where the generation comprises frequency shifting of the selected plurality of desired channels. The IF signal may be a digital signal and the DFE is configured to output the IF signal via a serial or parallel interface.

公开(公告)号：US10313733B2

公开(公告)日：2019-06-04

申请号：US15792318

申请日：2017-10-24

Applicant: Maxlinear, Inc.

Inventor： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

IPC: H04B1/16 ,  H04B1/66 ,  H04N5/44 ,  H04H40/90 ,  H04N21/426 ,  H04B1/00 ,  H04N5/50 ,  H04N21/438 ,  H04N21/454 ,  H04N21/61 ,  H04N5/455

Abstract: A wideband receiver system comprises a wideband analog-to-digital converter (ADC) module and a digital frontend (DFE) module. The wideband ADC is configured to concurrently digitize a band of frequencies comprising a plurality of desired channels and a plurality of undesired channels. The DFE module is coupled to the digital in-phase and quadrature signals. The DFE module is configured to select the plurality of desired channels from the digitized band of frequencies, and generate an intermediate frequency (IF) signal comprising the selected plurality of desired channels and having a bandwidth that is less than a bandwidth of the band of frequencies, where the generation comprises frequency shifting of the selected plurality of desired channels. The IF signal may be a digital signal and the DFE is configured to output the IF signal via a serial or parallel interface.

公开(公告)号：US20180176060A1

公开(公告)日：2018-06-21

申请号：US15896637

申请日：2018-02-14

Applicant: Maxlinear, Inc.

Inventor： Curtis Ling ,  Tim Gallagher ,  Elad Shaked

IPC: H04L27/26 ,  H04J11/00

Abstract: A transmitter comprises a first peak-to-average-power ratio (PAPR) suppression circuit and a second peak-to-average-power ratio (PAPR) suppression circuit. The first PAPR suppression circuit may receive a first sequence of time-domain symbols to be transmitted, alter the first sequence based on each of a plurality of symbol ordering and/or inversion descriptors to generate a corresponding plurality of second sequences of time-domain symbols, measure a PAPR corresponding to each of the second sequences, select one of the plurality of symbol ordering and/or inversion descriptors based on the measurement of PAPR, and convey the selected one of the symbol ordering and/or inversion descriptors to the second PAPR suppression circuit. The second PAPR suppression circuit may receive the first sequence of time-domain symbols to be transmitted, and alter the first sequence based on the selected one of the symbol ordering and/or inversion descriptors to generate a reordered and/or inverted symbol sequence.